Two UV colours of the central part of M31.
Abstract
Two photographs of the galaxy M 31 have been obtained in the far UV with a Faust rocket experiment and in the near UV with the S 183 experiment aboard Skylab. Only the central part of the galaxy is detected. Reductions provide both the energy received and the angular area over M 31 from which it is emitted. The UV flux is brighter than expected from extrapolation of the visible spectrum. The distribution below 300 A is rather flat and different from previous OAO-2 observations. These results, combined with Lyman continuum flux evaluation, are used to discuss the temperature and the age of the stars which may be responsible for this anomalous UV distribution.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 1976
- Bibcode:
- 1976A&A....50..371D
- Keywords:
-
- Andromeda Galaxy;
- Galactic Nuclei;
- Rocket-Borne Photography;
- Spaceborne Astronomy;
- Stellar Evolution;
- Ultraviolet Spectra;
- Density Distribution;
- Far Ultraviolet Radiation;
- Globular Clusters;
- Imaging Techniques;
- Interstellar Extinction;
- Lyman Spectra;
- Near Ultraviolet Radiation;
- Skylab Program;
- Stellar Luminosity;
- Stellar Temperature;
- Astrophysics